tcc.c

   1 /*
   2  *  TCC - Tiny C Compiler
   3  *
   4  *  Copyright (c) 2001-2004 Fabrice Bellard
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include "libtcc.c"
  22
  23 void help(void)
  24 {
  25     printf("tcc version " TCC_VERSION " - Tiny C Compiler - Copyright (C) 2001-2006 Fabrice Bellard\n"
  26            "usage: tcc [-v] [-c] [-o outfile] [-Bdir] [-bench] [-Idir] [-Dsym[=val]] [-Usym]\n"
  27            "           [-Wwarn] [-g] [-b] [-bt N] [-Ldir] [-llib] [-shared] [-soname name]\n"
  28            "           [-static] [infile1 infile2...] [-run infile args...]\n"
  29            "\n"
  30            "General options:\n"
  31            "  -v          display current version, increase verbosity\n"
  32            "  -c          compile only - generate an object file\n"
  33            "  -o outfile  set output filename\n"
  34            "  -Bdir       set tcc internal library path\n"
  35            "  -bench      output compilation statistics\n"
  36            "  -run        run compiled source\n"
  37            "  -fflag      set or reset (with 'no-' prefix) 'flag' (see man page)\n"
  38            "  -Wwarning   set or reset (with 'no-' prefix) 'warning' (see man page)\n"
  39            "  -w          disable all warnings\n"
  40            "Preprocessor options:\n"
  41            "  -E          preprocess only\n"
  42            "  -Idir       add include path 'dir'\n"
  43            "  -Dsym[=val] define 'sym' with value 'val'\n"
  44            "  -Usym       undefine 'sym'\n"
  45            "Linker options:\n"
  46            "  -Ldir       add library path 'dir'\n"
  47            "  -llib       link with dynamic or static library 'lib'\n"
  48            "  -shared     generate a shared library\n"
  49            "  -soname     set name for shared library to be used at runtime\n"
  50            "  -static     static linking\n"
  51            "  -rdynamic   export all global symbols to dynamic linker\n"
  52            "  -r          generate (relocatable) object file\n"
  53            "Debugger options:\n"
  54            "  -g          generate runtime debug info\n"
  55 #ifdef CONFIG_TCC_BCHECK
  56            "  -b          compile with built-in memory and bounds checker (implies -g)\n"
  57 #endif
  58 #ifdef CONFIG_TCC_BACKTRACE
  59            "  -bt N       show N callers in stack traces\n"
  60 #endif
  61            );
  62 }
  63
  64 static char **files;
  65 static int nb_files, nb_libraries;
  66 static int multiple_files;
  67 static int print_search_dirs;
  68 static int output_type;
  69 static int reloc_output;
  70 static const char *outfile;
  71 static int do_bench = 0;
  72
  73 #define TCC_OPTION_HAS_ARG 0x0001
  74 #define TCC_OPTION_NOSEP   0x0002 /* cannot have space before option and arg */
  75
  76 typedef struct TCCOption {
  77     const char *name;
  78     uint16_t index;
  79     uint16_t flags;
  80 } TCCOption;
  81
  82 enum {
  83     TCC_OPTION_HELP,
  84     TCC_OPTION_I,
  85     TCC_OPTION_D,
  86     TCC_OPTION_U,
  87     TCC_OPTION_L,
  88     TCC_OPTION_B,
  89     TCC_OPTION_l,
  90     TCC_OPTION_bench,
  91     TCC_OPTION_bt,
  92     TCC_OPTION_b,
  93     TCC_OPTION_g,
  94     TCC_OPTION_c,
  95     TCC_OPTION_static,
  96     TCC_OPTION_shared,
  97     TCC_OPTION_soname,
  98     TCC_OPTION_o,
  99     TCC_OPTION_r,
 100     TCC_OPTION_Wl,
 101     TCC_OPTION_W,
 102     TCC_OPTION_O,
 103     TCC_OPTION_m,
 104     TCC_OPTION_f,
 105     TCC_OPTION_nostdinc,
 106     TCC_OPTION_nostdlib,
 107     TCC_OPTION_print_search_dirs,
 108     TCC_OPTION_rdynamic,
 109     TCC_OPTION_run,
 110     TCC_OPTION_v,
 111     TCC_OPTION_w,
 112     TCC_OPTION_pipe,
 113     TCC_OPTION_E,
 114     TCC_OPTION_x,
 115 };
 116
 117 static const TCCOption tcc_options[] = {
 118     { "h", TCC_OPTION_HELP, 0 },
 119     { "?", TCC_OPTION_HELP, 0 },
 120     { "I", TCC_OPTION_I, TCC_OPTION_HAS_ARG },
 121     { "D", TCC_OPTION_D, TCC_OPTION_HAS_ARG },
 122     { "U", TCC_OPTION_U, TCC_OPTION_HAS_ARG },
 123     { "L", TCC_OPTION_L, TCC_OPTION_HAS_ARG },
 124     { "B", TCC_OPTION_B, TCC_OPTION_HAS_ARG },
 125     { "l", TCC_OPTION_l, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
 126     { "bench", TCC_OPTION_bench, 0 },
 127     { "bt", TCC_OPTION_bt, TCC_OPTION_HAS_ARG },
 128 #ifdef CONFIG_TCC_BCHECK
 129     { "b", TCC_OPTION_b, 0 },
 130 #endif
 131     { "g", TCC_OPTION_g, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
 132     { "c", TCC_OPTION_c, 0 },
 133     { "static", TCC_OPTION_static, 0 },
 134     { "shared", TCC_OPTION_shared, 0 },
 135     { "soname", TCC_OPTION_soname, TCC_OPTION_HAS_ARG },
 136     { "o", TCC_OPTION_o, TCC_OPTION_HAS_ARG },
 137     { "run", TCC_OPTION_run, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
 138     { "rdynamic", TCC_OPTION_rdynamic, 0 },
 139     { "r", TCC_OPTION_r, 0 },
 140     { "Wl,", TCC_OPTION_Wl, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
 141     { "W", TCC_OPTION_W, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
 142     { "O", TCC_OPTION_O, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
 143     { "m", TCC_OPTION_m, TCC_OPTION_HAS_ARG },
 144     { "f", TCC_OPTION_f, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
 145     { "nostdinc", TCC_OPTION_nostdinc, 0 },
 146     { "nostdlib", TCC_OPTION_nostdlib, 0 },
 147     { "print-search-dirs", TCC_OPTION_print_search_dirs, 0 },
 148     { "v", TCC_OPTION_v, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
 149     { "w", TCC_OPTION_w, 0 },
 150     { "pipe", TCC_OPTION_pipe, 0},
 151     { "E", TCC_OPTION_E, 0},
 152     { "x", TCC_OPTION_x, TCC_OPTION_HAS_ARG },
 153     { NULL },
 154 };
 155
 156 static int64_t getclock_us(void)
 157 {
 158 #ifdef _WIN32
 159     struct _timeb tb;
 160     _ftime(&tb);
 161     return (tb.time * 1000LL + tb.millitm) * 1000LL;
 162 #else
 163     struct timeval tv;
 164     gettimeofday(&tv, NULL);
 165     return tv.tv_sec * 1000000LL + tv.tv_usec;
 166 #endif
 167 }
 168
 169 static int strstart(const char *str, const char *val, const char **ptr)
 170 {
 171     const char *p, *q;
 172     p = str;
 173     q = val;
 174     while (*q != '\0') {
 175         if (*p != *q)
 176             return 0;
 177         p++;
 178         q++;
 179     }
 180     if (ptr)
 181         *ptr = p;
 182     return 1;
 183 }
 184
 185 /* convert 'str' into an array of space separated strings */
 186 static int expand_args(char ***pargv, const char *str)
 187 {
 188     const char *s1;
 189     char **argv, *arg;
 190     int argc, len;
 191
 192     argc = 0;
 193     argv = NULL;
 194     for(;;) {
 195         while (is_space(*str))
 196             str++;
 197         if (*str == '\0')
 198             break;
 199         s1 = str;
 200         while (*str != '\0' && !is_space(*str))
 201             str++;
 202         len = str - s1;
 203         arg = tcc_malloc(len + 1);
 204         memcpy(arg, s1, len);
 205         arg[len] = '\0';
 206         dynarray_add((void ***)&argv, &argc, arg);
 207     }
 208     *pargv = argv;
 209     return argc;
 210 }
 211
 212 int parse_args(TCCState *s, int argc, char **argv)
 213 {
 214     int optind;
 215     const TCCOption *popt;
 216     const char *optarg, *p1, *r1;
 217     char *r;
 218
 219     optind = 0;
 220     while (optind < argc) {
 221
 222         r = argv[optind++];
 223         if (r[0] != '-' || r[1] == '\0') {
 224             /* add a new file */
 225             dynarray_add((void ***)&files, &nb_files, r);
 226             if (!multiple_files) {
 227                 optind--;
 228                 /* argv[0] will be this file */
 229                 break;
 230             }
 231         } else {
 232             /* find option in table (match only the first chars */
 233             popt = tcc_options;
 234             for(;;) {
 235                 p1 = popt->name;
 236                 if (p1 == NULL)
 237                     error("invalid option -- '%s'", r);
 238                 r1 = r + 1;
 239                 for(;;) {
 240                     if (*p1 == '\0')
 241                         goto option_found;
 242                     if (*r1 != *p1)
 243                         break;
 244                     p1++;
 245                     r1++;
 246                 }
 247                 popt++;
 248             }
 249         option_found:
 250             if (popt->flags & TCC_OPTION_HAS_ARG) {
 251                 if (*r1 != '\0' || (popt->flags & TCC_OPTION_NOSEP)) {
 252                     optarg = r1;
 253                 } else {
 254                     if (optind >= argc)
 255                         error("argument to '%s' is missing", r);
 256                     optarg = argv[optind++];
 257                 }
 258             } else {
 259                 if (*r1 != '\0')
 260                     return 0;
 261                 optarg = NULL;
 262             }
 263
 264             switch(popt->index) {
 265             case TCC_OPTION_HELP:
 266                 return 0;
 267
 268             case TCC_OPTION_I:
 269                 if (tcc_add_include_path(s, optarg) < 0)
 270                     error("too many include paths");
 271                 break;
 272             case TCC_OPTION_D:
 273                 {
 274                     char *sym, *value;
 275                     sym = (char *)optarg;
 276                     value = strchr(sym, '=');
 277                     if (value) {
 278                         *value = '\0';
 279                         value++;
 280                     }
 281                     tcc_define_symbol(s, sym, value);
 282                 }
 283                 break;
 284             case TCC_OPTION_U:
 285                 tcc_undefine_symbol(s, optarg);
 286                 break;
 287             case TCC_OPTION_L:
 288                 tcc_add_library_path(s, optarg);
 289                 break;
 290             case TCC_OPTION_B:
 291                 /* set tcc utilities path (mainly for tcc development) */
 292                 tcc_set_lib_path(s, optarg);
 293                 break;
 294             case TCC_OPTION_l:
 295                 dynarray_add((void ***)&files, &nb_files, r);
 296                 nb_libraries++;
 297                 break;
 298             case TCC_OPTION_bench:
 299                 do_bench = 1;
 300                 break;
 301 #ifdef CONFIG_TCC_BACKTRACE
 302             case TCC_OPTION_bt:
 303                 num_callers = atoi(optarg);
 304                 break;
 305 #endif
 306 #ifdef CONFIG_TCC_BCHECK
 307             case TCC_OPTION_b:
 308                 s->do_bounds_check = 1;
 309                 s->do_debug = 1;
 310                 break;
 311 #endif
 312             case TCC_OPTION_g:
 313                 s->do_debug = 1;
 314                 break;
 315             case TCC_OPTION_c:
 316                 multiple_files = 1;
 317                 output_type = TCC_OUTPUT_OBJ;
 318                 break;
 319             case TCC_OPTION_static:
 320                 s->static_link = 1;
 321                 break;
 322             case TCC_OPTION_shared:
 323                 output_type = TCC_OUTPUT_DLL;
 324                 break;
 325             case TCC_OPTION_soname:
 326                 s->soname = optarg;
 327                 break;
 328             case TCC_OPTION_o:
 329                 multiple_files = 1;
 330                 outfile = optarg;
 331                 break;
 332             case TCC_OPTION_r:
 333                 /* generate a .o merging several output files */
 334                 reloc_output = 1;
 335                 output_type = TCC_OUTPUT_OBJ;
 336                 break;
 337             case TCC_OPTION_nostdinc:
 338                 s->nostdinc = 1;
 339                 break;
 340             case TCC_OPTION_nostdlib:
 341                 s->nostdlib = 1;
 342                 break;
 343             case TCC_OPTION_print_search_dirs:
 344                 print_search_dirs = 1;
 345                 break;
 346             case TCC_OPTION_run:
 347                 {
 348                     int argc1;
 349                     char **argv1;
 350                     argc1 = expand_args(&argv1, optarg);
 351                     if (argc1 > 0) {
 352                         parse_args(s, argc1, argv1);
 353                     }
 354                     multiple_files = 0;
 355                     output_type = TCC_OUTPUT_MEMORY;
 356                 }
 357                 break;
 358             case TCC_OPTION_v:
 359                 do {
 360                     if (0 == s->verbose++)
 361                         printf("tcc version %s\n", TCC_VERSION);
 362                 } while (*optarg++ == 'v');
 363                 break;
 364             case TCC_OPTION_f:
 365                 if (tcc_set_flag(s, optarg, 1) < 0 && s->warn_unsupported)
 366                     goto unsupported_option;
 367                 break;
 368             case TCC_OPTION_W:
 369                 if (tcc_set_warning(s, optarg, 1) < 0 &&
 370                     s->warn_unsupported)
 371                     goto unsupported_option;
 372                 break;
 373             case TCC_OPTION_w:
 374                 s->warn_none = 1;
 375                 break;
 376             case TCC_OPTION_rdynamic:
 377                 s->rdynamic = 1;
 378                 break;
 379             case TCC_OPTION_Wl:
 380                 {
 381                     const char *p;
 382                     if (strstart(optarg, "-Ttext,", &p)) {
 383                         s->text_addr = strtoul(p, NULL, 16);
 384                         s->has_text_addr = 1;
 385                     } else if (strstart(optarg, "--oformat,", &p)) {
 386                         if (strstart(p, "elf32-", NULL)) {
 387                             s->output_format = TCC_OUTPUT_FORMAT_ELF;
 388                         } else if (!strcmp(p, "binary")) {
 389                             s->output_format = TCC_OUTPUT_FORMAT_BINARY;
 390                         } else
 391 #ifdef TCC_TARGET_COFF
 392                         if (!strcmp(p, "coff")) {
 393                             s->output_format = TCC_OUTPUT_FORMAT_COFF;
 394                         } else
 395 #endif
 396                         {
 397                             error("target %s not found", p);
 398                         }
 399                     } else {
 400                         error("unsupported linker option '%s'", optarg);
 401                     }
 402                 }
 403                 break;
 404             case TCC_OPTION_E:
 405                 output_type = TCC_OUTPUT_PREPROCESS;
 406                 break;
 407             case TCC_OPTION_x:
 408                 break;
 409             default:
 410                 if (s->warn_unsupported) {
 411                 unsupported_option:
 412                     warning("unsupported option '%s'", r);
 413                 }
 414                 break;
 415             }
 416         }
 417     }
 418     return optind + 1;
 419 }
 420
 421 int main(int argc, char **argv)
 422 {
 423     int i;
 424     TCCState *s;
 425     int nb_objfiles, ret, optind;
 426     char objfilename[1024];
 427     int64_t start_time = 0;
 428
 429     s = tcc_new();
 430
 431     output_type = TCC_OUTPUT_EXE;
 432     outfile = NULL;
 433     multiple_files = 1;
 434     files = NULL;
 435     nb_files = 0;
 436     nb_libraries = 0;
 437     reloc_output = 0;
 438     print_search_dirs = 0;
 439     ret = 0;
 440
 441     optind = parse_args(s, argc - 1, argv + 1);
 442     if (print_search_dirs) {
 443         /* enough for Linux kernel */
 444         printf("install: %s/\n", s->tcc_lib_path);
 445         return 0;
 446     }
 447     if (optind == 0 || nb_files == 0) {
 448         if (optind && s->verbose)
 449             return 0;
 450         help();
 451         return 1;
 452     }
 453
 454     nb_objfiles = nb_files - nb_libraries;
 455
 456     /* if outfile provided without other options, we output an
 457        executable */
 458     if (outfile && output_type == TCC_OUTPUT_MEMORY)
 459         output_type = TCC_OUTPUT_EXE;
 460
 461     /* check -c consistency : only single file handled. XXX: checks file type */
 462     if (output_type == TCC_OUTPUT_OBJ && !reloc_output) {
 463         /* accepts only a single input file */
 464         if (nb_objfiles != 1)
 465             error("cannot specify multiple files with -c");
 466         if (nb_libraries != 0)
 467             error("cannot specify libraries with -c");
 468     }
 469
 470
 471     if (output_type == TCC_OUTPUT_PREPROCESS) {
 472         if (!outfile) {
 473             s->outfile = stdout;
 474         } else {
 475             s->outfile = fopen(outfile, "w");
 476             if (!s->outfile)
 477                 error("could not open '%s", outfile);
 478         }
 479     } else if (output_type != TCC_OUTPUT_MEMORY) {
 480         if (!outfile) {
 481             /* compute default outfile name */
 482             char *ext;
 483             const char *name =
 484                 strcmp(files[0], "-") == 0 ? "a" : tcc_basename(files[0]);
 485             pstrcpy(objfilename, sizeof(objfilename), name);
 486             ext = tcc_fileextension(objfilename);
 487 #ifdef TCC_TARGET_PE
 488             if (output_type == TCC_OUTPUT_DLL)
 489                 strcpy(ext, ".dll");
 490             else
 491             if (output_type == TCC_OUTPUT_EXE)
 492                 strcpy(ext, ".exe");
 493             else
 494 #endif
 495             if (output_type == TCC_OUTPUT_OBJ && !reloc_output && *ext)
 496                 strcpy(ext, ".o");
 497             else
 498                 pstrcpy(objfilename, sizeof(objfilename), "a.out");
 499             outfile = objfilename;
 500         }
 501     }
 502
 503     if (do_bench) {
 504         start_time = getclock_us();
 505     }
 506
 507     tcc_set_output_type(s, output_type);
 508
 509     /* compile or add each files or library */
 510     for(i = 0; i < nb_files && ret == 0; i++) {
 511         const char *filename;
 512
 513         filename = files[i];
 514         if (filename[0] == '-' && filename[1]) {
 515             if (tcc_add_library(s, filename + 2) < 0) {
 516                 error_noabort("cannot find %s", filename);
 517                 ret = 1;
 518             }
 519         } else {
 520             if (1 == s->verbose)
 521                 printf("-> %s\n", filename);
 522             if (tcc_add_file(s, filename) < 0)
 523                 ret = 1;
 524         }
 525     }
 526
 527     /* free all files */
 528     tcc_free(files);
 529
 530     if (0 == ret) {
 531         if (do_bench)
 532             tcc_print_stats(s, getclock_us() - start_time);
 533
 534         if (s->output_type == TCC_OUTPUT_PREPROCESS) {
 535             if (outfile)
 536                 fclose(s->outfile);
 537         } else if (s->output_type == TCC_OUTPUT_MEMORY)
 538             ret = tcc_run(s, argc - optind, argv + optind);
 539         else
 540             ret = tcc_output_file(s, outfile) ? 1 : 0;
 541     }
 542
 543     tcc_delete(s);
 544
 545 #ifdef MEM_DEBUG
 546     if (do_bench) {
 547         printf("memory: %d bytes, max = %d bytes\n", mem_cur_size, mem_max_size);
 548     }
 549 #endif
 550     return ret;
 551 }